A compact Bluetooth/Ultrawideband (UWB) dual- band planar antenna with quadruple band-notch characteristics is presented. The proposed structure consists of a UWB semi-elliptical monopole, attached to an approximate trapezoidal spiral for 2.45-GHz Bluetooth application. utilizes rectangular resonant structures rejection frequency bands, i.e., WiMAX (3.3-3.6 GHz), WLAN (5.15-5.35, 5.725-5.825 and ITU 8 GHz. These spirals are capacitively coupled the microstrip feedline. controlled by changing...

A Multiple Input Output (MIMO) antenna consisting of two 90 - angularly separated semicircular monopoles with steps for Bluetooth, Wi-Fi, Wi-MAX and UWB applications is proposed. Initially, an array coplanar circular element separation 25mm investigated. In this conflguration, mutual coupling < i5dB i10dB over 2GHz{3GHz 3GHz{10.6GHz, respectively. Mutual reduced by using monopoles. With though the improved, impedance bandwidth due to reduction in electrical length. step like structure...

A cross configuration of directional ultrawideband (UWB) antennas for multidirectional pattern diversity characteristics is presented. Initially, a printed UWB circular monopole having an asymmetric curve shaped CPW feed designed as base antenna obtaining radiation pattern, direction which remains fairly same the entire UWB. This attached to similar antennas, in four element cross-configuration achieve characteristics. The proposed structure provides high inter-element isolation more than 20...

In this paper a low cost, high gain, cross-polar and compact edge feed printed elliptical antenna with partial ground plane parasitic patches is proposed investigated. The fabricated on 1.6mm thick FR4 substrate dielectric constant of 4.4 loss tangent 0.025. total planar area the (L £ W) 28 24mm 2 . Both simulated experimental result shows that provides frequency range compatible ultra-wideband (UWB) standard, i.e., 3.5GHz{12GHz band. radiation pattern produced by approximately...

This work presents an optically transparent frequency-selective surface (FSS)-based electromagnetic (EM) wave absorber that is polarization insensitive and offers a wide-band absorption bandwidth of 9 GHz within the C, X, Ku bands. A slotted unit cell annular ring integrated with cross exhibits fourfold symmetry, which makes it insensitive. The proposed compact as area <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math...

A novel half Hemispherical Dielectric Resonator Antenna (HDRA) with an array of slots has been designed. The dielectric material used is Rogers TMM10, which a ceramic thermoset polymer composite having constant r = 9:2. Periodic holes lower down the Q factor antenna and hence enhance impedance bandwidth. measured value 10dB bandwidth close to 1GHz (»17.74%). mode investigated TM101 like mode. Further, efiect increasing probe length on resonance radiation pattern also studied. As increased,...

In this work, a polarization independent and wideband electromagnetic (EM) waves absorbing frequency selective surface (FSS) structure is presented. The unit cell of the proposed FSS consists an assembly cross arrow resonators with four SMD resistors mounted on it, to enhance absorbance bandwidth. This also possesses four-fold symmetry which makes it insensitive. designed compact length width dimensions as 0.19λL × 0.19λL, thickness 0.13λL, where λL guided wavelength corresponding lowest...

This paper presents a reconfigurable dual band-notched U-shape UWB (Ultra Wide Band) Microstrip line fed monopole antenna. Dual-Band notches are introduced by introducing 'T' shape resonator and etching reverse split ring slots (Complementary Split Ring Resonator (CSRR)). The proposed antenna revealed good performance i.e. impedance bandwidth of 3.1 GHz–10.6 GHz with VSWR < 2, accompanied adaptable band-rejection function (WLAN WiMAX) in order to avoid interference caused from the IEEE...

This article presents, a mutual coupling reduction technique between very closely spaced (1.8 mm) two-element microstrip-based multiple-input multiple-output (MIMO) antennas using modified inverted-fork-shaped decoupling (m-IFSD) structure. The m-IFSD structure consists of an inverted fork and cross-shaped with shorted via. combined effect inverted-fork results in below <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math...

Research into humanoid robotics explores interactive artificial smart skins that detect real-life cues and interact with humans. This study delves a cost-effective approach for creating e-skin sensors, particularly utilizing room-temperature liquid metal in various sensory configurations. Proposing novel Gallium-Indium-tin alloy (Galinstan) microfluidic sensor employs PDMS microchannels filled Galinstan, offering stretchability, high sensitivity, skin-mountable properties. The prototype...

In this paper, a stage wise realization of compact Bluetooth | UWB dual-band diversity antenna with WiMAX and WLAN band-notch characteristics is presented. The proposed structure consists two co-planar semicircular dual monopole antennas, mounted planar spiral. Individual conflguration provides an impedance bandwidth (VSWR < 2) for dual- band i.e., both bands. For characteristic, sets spirals are capacitively coupled the feed line antenna. This (3.3{3.6GHz) (5.13{5.85GHz) enhancing reception...

This paper presents a CPW feed Ultra Wideband (UWB) printed circular monopole antenna, with curved shaped extended asymmetric ground plane for stable-unidirectional radiation pattern. Initially, the of planar is elliptically tapered to enhanced its UWB bandwidth. further modified in curve shape similar achieving unidirectional Simulated and measured results show that proposed antenna achieves an impedance bandwidth (VSWR<;2) 20 GHz i.e. from 1GHz GHz, which covers all lower narrow microwave...

A compact, ultra-wideband monopole antenna with triple band-notch characteristic is presented. Proposed consists of an elliptical radiator for achieving UWB bandwidth. For rejecting WiMAX (3.3-3.6 GHz) and WLAN (5.15-5.3 GHz, 5.7-5.825 bands, loaded Non-concentric open ended rings. The effective lengths these non-concentric rings are approximately half wavelength the respective notch frequencies. Overall surface dimension fabricated 25×18 mm <sup...

A wide band circularly polarised diversity antenna consisting of closely spaced monopole radiators is proposed. Two novel, microstrip fed‐printed monopoles are designed on a common ground plane. The plane which asymmetric with respect to the feed line along planar structure used achieve circular polarisation. symmetric vertical axis produce orthogonally waves. modified split ring resonator‐like high port‐to‐port isolation. impedance bandwidth (Voltage Standing Wave Ratio &lt; 2) proposed...

This work presents dual band, polarization insensitive and angular stable radar absorber structure. Here, proposed unit cell has two resonator structures M N. Each provides absorption at distinct frequencies in X Ku band. Simulation results different cases show that the structure is up to 60 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sup> . Calculated effective impedance plot surface current distribution top bottom supports mechanism...

In this paper, a novel and compact dual-band fllter with enhanced upper stop characteristics has been presented. Dual band pass are achieved by introducing transmission zero (TZ) in of (BPF). The wide (BPF) is implemented combining low (i.e., stepped impedance resonator) high short stubs). Closed rectangular ring resonator (CRRR) open loop (OLRR) combination used to produce two zeros (TZs). One TZ placed on the BPF such that resultant characteristic consists band. However, second at edge...

A compact multiple band-notch ultra-wide band (UWB) band-pass fllter (BPF) with surface area of 18£12mm 2 is introduced in this article. The proposed a combination novel symmetrically tapered elliptic rings (STER) and contiguous split ring resonators (SRR), stepped impedance resonator (SIR) structure to realize the multi-band notch UWB pass characteristics. In structure, band-notches are generated for interfering microwave bands such as, WiMAX, WLAN X-band applications. These notches...

This study presents the design of an efficient, moderately high gain and portable antenna operating at 58.27 MHz. The proposed is a multilayered hemi‐cylindrical shaped structure, which works on principle resonant inductive coupling using multi‐turn loop. An equivalent circuit, takes into account near field effects, also developed. electrically small with finite ground plane has overall volume 0.038λ 0 × 0.058λ . exhibits 3.43 dBi efficiency 92.5% as obtained from measured results frequency....

In this work, a flexible radar absorber structure is presented which offers high absorbance within X band. The proposed designed by integrating two different resonators provides angular-stability properties. theoretical and experimental results indicate that the polarization insensitive angular stable up to 60° in both TE TM cases. Apart from conventional absorptivity analysis, cross-polarization reflection of also calculated. simulated FSS configuration behaves as proper not convertor....

A multiple input output (MIMO) antenna consisting of two hybrid shaped monopoles for UWB applications is presented. In the proposed antenna, a pair rectangular strips terminated with shorting posts used to achieve isolation ≥ 20 dB over UWB. The variations in group delay and transfer-function response are within 1 ns 13 respectively. envelope correlation coefficient <; 0.05 3.1-10.6 GHz indicate that suitable MIMO applications.

A multi-functional metasurface structure is presented in this paper. This consists of two resonating structures printed on FR-4 substrates, while the bottom side completely laminated with copper. The proposed design offered absorption at 6.1 GHz frequency 200 MHz bandwidth and polarization conversion X band from 7.8 to 11.9 band. unit cell compact a length width <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$0.31\lambda\times...

This work presents an electrically small antenna (ESA) for wireless applications, such as digital cellular systems (DCS1800), WiMAX, and sub 6 GHz – 5G new radio (NR) systems. The proposed offers a triple band resonance centered at 1.825, 3.3, 3.58 GHz. Here, impedance matching networks of printed microstrip line sections, inverted 'L', open-ended line, meandered capacitive stub, are used to achieve the desired frequencies. total surface area is 0.14λ × 0.06λ, where λ wavelength 1.825...

This paper presents a Dual band electromagnetic wave absorber with improved polarization insensitivity. Here, the proposed consists of two independent resonators `P' and `Q' which are integrated together to provide dual absorption at 8.05 GHz 10.95 GHz. The is analyzed using multiple parameters like, surface current density resonant frequencies, angles, S-parameters. measured results indicate that configuration provides an absorptivity around 99.9% 97.3% wide angular insensitivity bandwidth...

This paper presents the design and analysis of dual band electrically small antenna loaded with meander line loop resonator. The proposed (ESA) is designed on FR-4 substrate modified ground plane. radiating element consists metallic strip thin inductive a resonant triangular loop. presented configuration gives response at 1.81 GHz 2.56 GHz. higher resonance frequency controlled by tuning effective length strip. lower i.e. achieved using combination shunt lines topped surface area 40 mm× 15...

In this paper high gain parallel metal plated circular monopole UWB antenna with a planar reflector is proposed. The fabricated using 0.5 mm thick copper plate. Reflector of 50 × 60 placed 10 below the structure. VSWR = 2 and variation 7.5-10.2 dBi are obtained over 4.1-10.6 GHz. offers unidirectional radiation patterns in both planes cross polarization <; -20dB front to back ratio > 15 dB. nearly constant group delay. structure tested. Measured results agree simulation results.